Dick Powell's Zane Grey Theatre (1956)

S22E1 Attack of the Cybermen (1)

In 1985 London, the alien mercenary Lytton has found himself stuck for almost a year, but he's finally devised a scheme to break free. However, his escape hinges on the involvement of the Doctor's former adversaries. The question remains: why have they chosen this specific moment in Earth's timeline to make their presence known?